Dead-pulley rigging



(No Model.) 3 SheetsSheet 1.

J. Q. MARSH.

DEAD PULLBY RIGGING. No. 473,765. Patented Apr. 26, 1892.

(No Model.) 3 SheetsSheet 2.

J. Q. MARSH. DEAD PULLEY RIGGING.

Patented Apr. 26, 189-2.

(No Model.) 3 Sheets-Sheet 3.

J. A DEAD P Y RI G.

N0. 473,765. Patented Apr. 26, 1892.

UNITED STATES ATENT Price.

JOHN Q. MARSH, OF ERIE, PENNSYLVANIA.

DEAD-PULLEY RIGGING.

SPECIFICATION forming part of Letters Patent N 0. 473,765, dated April 26, 1892.

Application filed July 3, 1891- Serial No. 398.373. (No model.)

To (tZZ whom it may concern.-

Be it known that 1, JOHN Q. MARSH, a citizen of the United States, residing at Erie, in the county of Erie and State of Pennsylvania, have invented certain new and useful Improvements in Dead-Pulley Rigging; and I do hereby declare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to the rigging of a dead-pulley; and it consists in certain improvements in the construction thereof, as will be hereinafter fully set forth, and pointed out in the claims.

My invention is illustrated in the accompanying drawings, as follows:

Figure 1 is a top plan View of my improved rigging for a dead-pulley, the hanger B being in horizontal section on the line XXin Fig. 2. Fig. 2 is alongitudinal vertical section, partly in elevation, taken on the line Y Y in Fig. 1. Fig. 3 is an end View, looking from the right of Fig. 2, of the bracket which supports the deadpulley. Figs. 4:, 5, 6, and '7 are views of parts detached from the device and will be referred to in place in the following description. Fig. 8 is a side view of a common wooden split pulley adapted to be used as adead-pulley with my improved rigging, the split pulley being shown slightly separated. Fig. 9 is a like View of a common wooden webbed split pulley with a split iron hub adapted to be used with my improved rigging. Fig. 10 is an elevational view of one of the parts of the pulley shown in Fig. 9, the View showing the meeting face of the part.

In Fig. 2 the dead-pulley and the live-pulley or pulley, fixed to the shaft, are both shown in vertical section on their lines of parting, both being split wooden pulleys.

The construction of mydeviceis as follows: A represents the driving or line shaft; B, the dead pulley hanger; C G 0 the bracket which supports the dead-pulley and the means for moving said pulley; F, the dead-pulley, and G the live-pulley.

Other letters of reference will be referred to in proper place herein.

The dead-pulle and its rigging can be put in place withou disturbing the shaft A,

and, if necessary, without stopping it. The hanger B has two prongs or legs B'B', which straddle the shaft A, and it is fixed to the building-timbers above the shaft. The bracket 0 C 0 consists of a plate 0, which is attached to the hanger-prongs B by bolts B (seen in detail in Fig. 4,) which pass through slots 0 in the plate, a horn or sleeve 0, which serves as a journal for the dead-pulley and is provided with a longitudinal opening 0 along its under side to allow it to he slipped. over the shaft, and a back extension 0*, which supports the mechanism for moving the deadpulley laterally. The bolts B which attach the bracket 0 C (J to the hanger, pass through the slots 0 and engage by their hooked ends with the legs B of the hanger, as seen clearly in Fig. 1. The bracket can be adjusted upon the hanger by these bolts so as to bring the sleeve 0 and the dead-pulley, which is journaled thereon, concentric with the shaft A, be-

cause the bracket can be adjusted both vertically and laterally on the hanger. By moving the bolts up or down on the hanger the bracket may be adjusted vertically, and as the slots 0 are arc-for1ned and concentric with the sleeve 0 if one bolt is moved up and the other down the bracket can be adjusted laterally. The object in having the slots 0 curved concentric with the sleeve 0' is to enable the bracket to be so adjusted that the top of the back extension 0 maybe set horizontal or at an angle, whereby the lever D, hereinafter to be described, may lie in a plane horizontal-and parallel with the shaft or at an angle thereto.

E is a sliding block, which is guided in a groove on the back of the part 0 of the bracket and extends through the opening 0' in the plate 0 of the bracket. (See Fig. 3.) This sliding block, which is shown detached from the device in Fig. 6, has a lip e at one end, which engages an annular groove f in a collar F on the end of the hub of the dead-pulley, and it has also a cam-face 6 which is operated upon by the lever D, and also a horn e, to which a reacting spring E is connected.

D is the shifting-lever. It is an elbow-lever and is pivoted by the bolt (1 to the back extension 0 of the bracket. The short end of this ICO lever acts upon the cam-face e of the sliding bar D, which has the ordinary pins (1 d for contacting with the belt. If desired, the short end of the lever Dmay have a bearing-roller 162'" to act upon the sliding block E, as seen in ig. '7. i

It is desirable that the pivot 01 of the lever D may be adjustable from and toward the block E, so as to regulate the action of the lever upon the block E, as desired. To this end there is a slot 0 in the back extension C of the bracket, through which the pin CZ passes, and there is a plate H (see Fig. 5) above the bracket, with a round opening for the pin ti, and there is a nut and washer d and d on the pin below the bracket. The pin has a shoulder d so that it is larger where it passes through the lever D than where it passes through the plate H. Hence when the nut cl is tightened the plate II is clamped upon the top of the bracket and the lever D is free to move. The plate H has a horn h, to which the reacting spring E is connected.

In Fig. 8 it will be seen that the collar F is not divided on the line on which the pulley is divided, but so as to make lap-joints ffff. In Fig. 9 the pulley F has a solid web in place of cross-arms,as in the pulley F, and it has a split iron hub F lhese modifications are to show that thegroove f can be made in an iron hub like F as well as in a collar like F j and that, as shown in Fig.8, the collar can be so parted as not to endanger forming an uneven surface to catch the engaging-lip e on the block E.

The operation of my device is as follows: j, Normally the position of parts, we will as sume, is that of the dead-pulley at rest and carrying the belt. WVhen the pulley is at rest and carrying the belt, the parts are in the po sition shown in Fig. 1. To shift the belt onto the live-pulley, the lever D is moved from the position shown in Fig. 1 toward the right. (The position of the belt is shown by dotted lines.) Such a movement of theleverD moves the 'bar D to the right, and the short end of the lever acts upon the block E and slides it toward the right also. As this block is in engagement by the lip c with the dead-pulley, it moves the dead-pulley with it toward the live-pulley, against which it quicklyimpinges.

As soon as the dead-pulley abuts against the live-pulley it begins to rotate with it. By this time the short end of thelever D is acting'npon the straight part of the cam-face e andhence theblock is not being furthermoved, 1 although the lever D is moving and the beltpin d on the left of the belt is soon brought against the belt and moves it onto the livepulley. When this movement is completed, the short end of the lever D has passed over the straight part of the cam-face c and the reacting spring E can then act and draw the block E back and the dead-pulley with it away from contact with the'live-pulley. The dead-Q pulley then at once stops rotating and the belt is running on the live-pulley. The long end of the lever D will then be pointing toward the right at about the angle it is shown to be pointing toward the left in the figure, and the short end is in contact with the inclined face of the cam e on theopposite side of the block from where it is shown in the figure. WVhen it is desired to shift the belt back onto the dead-pulley, the lever is swung back into normal position, and in so moving it acts upon the cam e and moves the dead-pulley up against the live-pulley and gets it in rotation, and the belt is then shifted, and then the dead-pulley is drawn back away from the livepulley by the spring E and the parts are at normal, as-seen in Fig. 1.

The advantages of my construction are that the rigging can be put up without disturbing the line-shaft, that the bracket '0 C G can be adjusted both vertically and laterally on the hanger, and thereby bring the dead-pulley concentric with the shaft without care in mounting the 'hangenand that the bracket can be so adjusted as to allow the lever D to stand horizontal or incline upward or downward fromthe shaft.

What -I claim as new is- 1. In a dead-pulley rigging, the combination, with the hanger B B, of abracket having the plate 0 for attachment with said hanger, the slotted sleeve Gon one side of 'said'plat-e, embracing the shaft A for journaling the dead-pulleyconcentrically with said shaft, and the part 0 on the opposite side of said plate and above said shaft forsupporting'the mechanism for laterally moving the deadpulley, and means for adjusting said bracket both laterally and vertically on said'hanger.

2. In a dead-pulley rigging, the combination of the hanger 'B B, thebracket O 0'0 adj ustably attached to said hanger and embracing the shaft A, a dead-pulley journaled on the sleeve 0 of said bracket, the sliding block E, guided in ways on'the top of the back extension (3 of said bracket and having means for engaging said dead-pulley, and the lever D, pivoted on the back extension 0 of said bracket, for moving said sliding block.

3. In a dead-pulley rigging, the combination of a hanger B B, abracket O G .02, adjustably attached to said hanger and embracing the shaft A, a dead-pulley journaled on the sleeve 0 of said bracket, the vsliding block E, guided in ways on said bracket and having means for engaging said dead-pulley, and the lever D and spring E, supportedon the part 0 of said bracket, for movingsaid sliding block E in opposite directions.

4'. In a dead-pulley rigging, the combination of a hanger, a bracket adjustably secured to said hanger, a sleeve forming part of said bracket, which is slotted to straddle the shaft and form a journal for the dead-pulley, a dead -pulley journaled on said sleeve and movable laterally thereon,.a block guided to slide longitudinally on the top of the back extension 0 of said bracket and engaging with said dead-pulley, a shifting-lever pivoted on said back extension and acting with the short end upon said sliding block, and a I for engaging said grooved collar and movable to belt-shifting bar carried by the long end of in Ways on said fixed support, and means for said lever. moving said block.

5. In a dead-pulley rigging, the comhlnw In testimony whereof Iaffix mys'ignature in 5 tion of a fixed supporting-journal for the presence of two Witnesses.

dead-pulley, which embraces the shaft, a split JOHN Q. MARSH. dead-pulley mounted on said fixed support, a WVitnesses: split grooved collar F on said pulley having J NO. K. HALLOCK,

lap-joints ffff, a sliding block having a lip A. A. FREEMAN. 

